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An 18-year-old man with fever and headache for 1 week was prescribed with capsules containing Alpinia galanga by a Siddha physician.Three days later, the patient developed extensive crustations on the lower lip. A provisional diagnosis of erythema multiforme was made with this drug history and, after further investigation, herpes-associated erythema multiforme (HAEM) was made. The patient was managed with a 1-week course of tablet acyclovir and prednisolone. This case details the role of A. galanga in exasperating HAEM and also describes its management approach.
A. galanga belongs to Zingiberaceae (the ginger family). Its rhizome (rootstock) is commonly used in herbal medicine and as a spice in food. Its pharmacological actions are anti-inflammation, antioxidation, antiallergy, gastroprotection, hypoglycaemic effect and marked immunostimulation. An erythema multiforme-like reaction caused by A. galanga is due to the haptens present in it. The haptens in A. galanga are also strong allergens to T cells and provoke a T-cell-mediated immune response. Mechanisms of tissue damage include direct cytotoxicity against keratinocytes, mostly mediated by CD8+ T cells, and the T -cell release of cytokines that amplify the inflammatory response by targeting resident skin cells.1
Erythema multiforme is an acute and self-limiting mucocutaneous hypersensitivity reaction triggered by certain infections and medications. One of the most common predisposing factors for erythema multiforme is infection with herpes simplex virus (HSV). HAEM is an acute exudative dermatic and mucosal disease caused by the infecting HSV. It has a recurrence and idiorestriction, characterised by increasing of CD4+ T leucomonocytes.2 3
The most common trigger for the development of EM is the HSV (HSV-1 and HSV-2). The pathogenesis of HAEM is consistent with a delayed hypersensitivity reaction. The disease begins with the transport of HSV DNA fragments by circulating peripheral blood mononuclear CD34+ cells (Langerhans cell precursors) to keratinocytes, which leads to the recruitment of HSV-specific CD4+ Th1 cells. The inflammatory cascade is initiated by interferon γ (IFN-γ), which is released from the CD4+ cells in response to viral antigens, and immunomediated epidermal damage subsequently begins.4 5
An 18-year-old man reported to the department of oral medicine and radiology, with extensive painful ulcers and haemorrhagic crusts on the lower lip for the past 5 days. The patient presented with a 1-week history of fever and headache, for which he took capsules containing dry extract of A. galanga, prescribed by a Siddha physician.Three days later, he developed multiple small ulcerations with fragile haemorrhagic crustations on the lower lip.
Extra-oral examination revealed multiple irregular ulcers with bloody crustations on the lower lip (figure 1). Both submandibular lymph nodes were enlarged and tender. Intraorally, multiple erosions were seen on the left buccal mucosa and gingiva, and these areas were covered with erythematous halos (figure 2). There were no ulcers elsewhere on the body. Based on the drug history and clinical findings, a provisional diagnosis of erythema multiforme was made.
Laboratory investigation was carried out for HSV-1 IgG and HSV-2 IgM antibody using the chemoluminescent assay (CLIA) method, and was found to be positive both for HSV-1 IgG and HSV-2 IgM antibody. From the laboratory investigation, we finally concluded the diagnosis to be HAEM. The patient was advised to discontinue the A. galanga capsules as they were potentially aggravating his painful oral ulcers.
Treatment of erythema multiforme depends on the severity of the clinical features. Mild forms usually heal in 2–6 weeks; local wound care, topical analgesics or anaesthetics for pain control, and a liquid diet, are often indicated in these situations. For more severe cases, intensive management with intravenous fluid therapy may be necessary. Oral antihistamines and topical steroids may also be necessary to provide symptom relief. Systemic corticosteroids have been used successfully in some patients, but evidence to support their use for erythema multiforme is limited.6
The patient was treated with a 1-week course of tablet acyclovir 400 mg/day (5 times a day). He was also advised to apply triamcinolone acetonide 0.1% oral paste on his lower lip twice daily, and tablet prednisolone 20 mg two times a day was prescribed for 7 days. The patient was reviewed after a week. On follow-up, he presented with healed oral lesions in the lower labial mucosa and gingival region (figure 3A, B), and also in the vermilion border of the lower lip ( figure 4). The prednisolone dosage was tapered and stopped over the next 3 days. The patient was advised to continue tablet acyclovir 400 mg/day (two times a day) for 4 months.
Contributors: SKM, HKM and VSK contributed to diagnosis of the patient, concept of the paper, acquisition of data and drafting, revision and final approval of the article. SHK contributed to diagnosis of the patient, concept of the paper and drafting, revision and final approval of the article.
Competing interests: None declared.
Patient consent: Obtained.
Provenance and peer review: Not commissioned; externally peer reviewed.